Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c7304b9d5de5108…

MALICIOUS

PDF

85.3 KB Created: 2021-06-10 15:59:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 2068dbbf533c8c13da1ed73664a754ed SHA-1: 6c9cf6f0a683d5a03f86c78e85ce17e3024cf07b SHA-256: 3c7304b9d5de5108814951e436b9a73cb4b01b4abd6c7d87ac78544819bfd323
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, many pointing to disposable hosting services, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. The embedded URLs and the nature of the link farm point towards a phishing or content-scraping attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://crewmak.ru/pbw?utm_term=zinda+rehne+ke+liye+ek+mulakat+zaruri+hai+sanam+song PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4424647/normal_601584fec0c12.pdfIn PDF document text
    • https://getiwojaxewife.weebly.com/uploads/1/3/4/0/134012456/873953c33984fc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388046/normal_5ff25bdb2bb0a.pdfIn PDF document text
    • https://wukaxasupureje.weebly.com/uploads/1/3/4/4/134440875/4815152.pdfIn PDF document text
    • https://jebopisozezir.weebly.com/uploads/1/3/0/7/130739828/fiwupetukimu-dewudufasawasij-mifubopebo-kuzelol.pdfIn PDF document text
    • https://jixulonirepib.weebly.com/uploads/1/3/1/3/131398443/4c442ff3d67b1b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448538/normal_605af7f023c7c.pdfIn PDF document text
    • https://piturerakilapes.weebly.com/uploads/1/3/0/7/130775197/1351240.pdfIn PDF document text
    • https://lerivifaladadov.weebly.com/uploads/1/3/4/3/134334847/7804291.pdfIn PDF document text
    • https://suzaxuboju.weebly.com/uploads/1/3/4/3/134386311/wafonereras-wavufu-fewonalatin.pdfIn PDF document text
    • https://duvujisukodat.weebly.com/uploads/1/3/4/6/134674851/2786129.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423452/normal_60b8abf23ffae.pdfIn PDF document text
    • https://penixosifa.weebly.com/uploads/1/3/1/4/131482878/jeziwajovetupevim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459177/normal_60bcee3b2ff25.pdfIn PDF document text
    • https://luxexawasoju.weebly.com/uploads/1/3/4/1/134109261/verigiluwi.pdfIn PDF document text
    • https://xudixakutax.weebly.com/uploads/1/3/0/7/130776611/venujavesizop_dogojazetiwibiz_rurid_jezufugaj.pdfIn PDF document text
    • https://bojubuloxobepi.weebly.com/uploads/1/3/0/9/130969884/jematapov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503767/normal_601ac20d5ee07.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403282/normal_60045579be4e4.pdfIn PDF document text
    • https://pevidutapare.weebly.com/uploads/1/3/0/7/130740538/9917136.pdfIn PDF document text
    • https://vufavinit.weebly.com/uploads/1/3/4/6/134649981/tosolapirew.pdfIn PDF document text
    • https://kisofoga.weebly.com/uploads/1/3/1/3/131383553/74929.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBDF 5412 bytes
SHA-256: 404b10ca7d2aad2bbf66f7f05c37e8fbcebc4ba8aea53a152db127d2abf7b92e
font_01_sfnt_off0000fe2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE2B 9340 bytes
SHA-256: e11cbd29e5fce2c353a848ae7288516c14100a07975b484037752057e4000451
font_02_sfnt_off00011e49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E49 12884 bytes
SHA-256: 4a28bd985063c9d295c8ddef496046dc0daf6f40ef412b52461354bd0d98061f